package com.mmall.common;

import java.io.Serializable;

import org.codehaus.jackson.annotate.JsonIgnore;
import org.codehaus.jackson.map.annotate.JsonSerialize;
import org.codehaus.jackson.map.annotate.JsonSerialize.Inclusion;

@JsonSerialize(include=Inclusion.NON_NULL)
//保证序列化json的时候,如果是null的对 象,key也会消失
//这个是所有Action返回值的类型的泛型，返回给前端的统一为一个json字符串，包含状态码，信息，以及回应的请求数据
public class ServerResponse<T> implements Serializable{

	private int status;
	private String msg;
	private T data;
	
	@JsonIgnore
    //使之不在json序列化结果当中
	//判断是否成功的方法
    public boolean isSuccess(){
        return this.status == ResponseCode.SUCCESS.getCode();
    }
	
	public int getStatus() {
		return status;
	}
	public String getMsg() {
		return msg;
	}
	public T getData() {
		return data;
	}
	private ServerResponse(int status) {
		super();
		this.status = status;
	}
	private ServerResponse(int status, String msg) {
		super();
		this.status = status;
		this.msg = msg;
	}
	private ServerResponse(int status, T data) {
		super();
		this.status = status;
		this.data = data;
	}
	private ServerResponse(int status, String msg, T data) {
		super();
		this.status = status;
		this.msg = msg;
		this.data = data;
	}
	
	//使用私有的构造方法，不提供set方法，再提供公开的接口，保障构建规则的遵守
	//创建泛型静态方法需要在前面再加一个<T>
	//下面是关于成功或失败的构造方法接口
	public static <T> ServerResponse<T> createBySuccess(){
		return new ServerResponse<T>(ResponseCode.SUCCESS.getCode());
	}
	
	public static <T> ServerResponse<T> createBySuccessMessage(String msg){
		return new ServerResponse<T>(ResponseCode.SUCCESS.getCode(),msg);
	}
	
	public static <T> ServerResponse<T> createBySuccess(T data){
        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode(),data);
    }

    public static <T> ServerResponse<T> createBySuccess(String msg,T data){
        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode(),msg,data);
    }


    public static <T> ServerResponse<T> createByError(){
        return new ServerResponse<T>(ResponseCode.ERROR.getCode(),ResponseCode.ERROR.getDesc());
    } 


    public static <T> ServerResponse<T> createByErrorMessage(String errorMessage){
        return new ServerResponse<T>(ResponseCode.ERROR.getCode(),errorMessage);
    }

    public static <T> ServerResponse<T> createByErrorCodeMessage(int errorCode,String errorMessage){
        return new ServerResponse<T>(errorCode,errorMessage);
    }
}
